Once you've launched the no-installation-required utility, you can hold the Alt key down, and click-drag with the left mouse button to move windows around the screen or drag using the right mouse button to resize the window. You can also middle-click the titlebar to close the application, or right-click it to minimize to the taskbar.

There's also a number of added hotkeys, and you can customize all of the settings using the INI file in the same folder—since the utility is written in AutoHotkey, the syntax should be fairly easy to grasp for many Lifehacker readers. SecondShell is a free download for Windows only.